Safety-valve.



i. NTHML SFTY VALVE, APPucATma man mail. 1915.

HU Il QU .Il L. 1.1 m J ...a Gv :fl E U1 tire.

.nn sTA'rEs y PATENT 'onirica JOHN NATHAN, or :nos ANGELES, onLiroims, Assicnon or cnn-firman 'ro 1u. n.

GILCHBIST AND .ONE-THRD T JQ C. SPAULDING', 'OF LOS ANGELES, CALIFORNIA.

sereni-VALVE.

Specification of Letters Patent. Patented Jan. 11, 193.6.

application inea august 17, 191e. `seriai Nt. 45,981.'

T0 all whom it may concern:

,Be it known that I, JOHN NATHAN, 'a' subject of Great Britain, residing atv Los Angeles. county ofLos Angeles, and State of California, have invented a certain new and useful Improvement inQSaet Valves, of

which the following is a' .speci cation.

My invention relates to a valve and has especial reference to a'safety valve for pneumatic tires, one of the objects of this invention being to provide -a simple, cheap and l effective .valve that may replace the ordinarv tire valve andbequickly attached, and

which will aiitoniaticalljr relieve any excess of pressure due to expansion.

Another object of my invention is to provides safety valve whereby a predeterminedAv gage in ascertaining the pressure of air dur.

ing the pumping Vupoia tire.

ylhese and Iother objects are accomplished bj the device ,described in the subjoined specification, in connection with the accompanvingy drawing, in which,

Figure 1 is an enlarged'sectional view oi the valve embodying .my invention. igz

4is a detail o-the plugand yushlows a fragment of the housing with the indicating Y to the pressure, or less in low pressures and reater as the pressure inarrow thereon.

Mv invention comprises a housing ,1,preferably adapted for threadedf engagement with a tube 2, or an ordinary tire valve, but

capable or" lacing integrally united with p.,

A Y Threading in the upper part of the hpusplug 3, having an inwardly ditube formed in 'the thereof:I with e gagenient by a valve 5,

ns; an upper steni 6, extending through vond the bore 7 in said tube and piuff, 'i loiverzsteni d, about hich is coiled a spring restinglon a su. .Jole 9 Vserving to hold the valve 5, in engagenient "with its seat. To theend of said lower stern 8, is pivotally connected one end of a bar or lever 11,'ona fulruni 11T, Within the permitted before the leverin the one or the housing, the other end of said lever being provided with a slot for the accommodation of a link 12,"that extends through the slotand carries knob. or other device 13, for the purpose of engaging and moving said lever, as hereinafter appearing.

The link 12, is pivotally attached to a piston 1li, mounted on the tube 4, and provided with packings and 16, to prevent air leakage, a nut 17, holding Vthe piston on saidtuhe. Between said plug', and said piston 14,*is a spring 18, of a predetermined resisting tension and compressible to bringr `about a relief oeXcess pressure in in the following manner: Y

Assuming that in the position shown, the

the tire normal calculated pressure of air is in theV tire. When for any reason, the pressure rises, the piston 14, will be forced upwardly against the tension of the spring 18, and

relativelv te; *he tube Ll, in so doing causing the knob lfofthe link 12, to pull and operate the lever 11, which, drawing'down on the valve stein 8, unseats the valve 5, and

permits the excess 'air to escape through thev tube il. While the pressure of air in the tire is becoming equal to the normal tension of the spring 18, the piston recedes to nor# mal position, 1n so doing removing the vknob 13, from engagement with the lever 11, and causing the spring l?,V to seat the valve 5. The distance of the knob 13, from the lever 11, governs the amount of excess pressure the valve 5, is unseated,

and also governs the varying pressures that the different tireshold. Hence the distance of the knob from the lever is proportional progressively Ypiston and valvelv collectively are movable, in either direction tiitingsuch movement the other direction and thereby governingfthe distance .t thereof with respect 'to the knob. in this manner necessity for regulating the tension of the spring 13 is obviated.

n order to'prpvent supplying an excess amount oi" air topil tire, and ayoid the constant use of aiipres'sure pumping up of attire, the fell 'Wing provision is made- The piston lgis provided with a sleeve 19, lia-vinga port 29. The tube si, is provided with a series 01E s t ggered ports 21, distributed in tube in accordgige during the ance with which is provided with a valve 23,. held 1n placev by a feeble spring 24. lIt may be stated here that the piston 14, is movable 5 longitudinally on the tube 4, but held against rotatory movement therewith by thelink 12,

and the stationary pivot or fulcrum 11. g In f operation, the. indicatmg mark on' the plug representing the amount of pressureacalculated for a tire isbrought, by turning the-4 plug, to the arrow 25, on the,housing l, suchr movement of the plug, bringing that 'pary ticular one of the ports 21, which corresponds to the indicating mark, in line, but 15 out of register, with the port 20, in'the sleeve 19, of the piston. During the turningoperi -ation of the plug to cause the arrow to point l A directly to the indicating mark desired, the plug also descends together with'the spring, 2o piston, valve 5, and link 12. By such downward movementof the valve 5, thelever 11,

connected therewith at one end, is moved about its fulcrum` causing the free end thereof to be tilted upwardly and farther t5l away from the knob `13; of the 'link 12.Iv

When air is supplied, the valve, is and ref,- "'mains unseated; When the pistonV moves upwardly onthe tube againstthe tension of the spring and under the pressure of the air,

80 the lport 20, will come in register with thatV port 21, with -which it is in line,.whereupon f the air will escape through the now register-v ing ports 20. and 2l, into the spacev between the piston4 and plugand to the, atmosphere,

through the valve 23. Such escape will continue aslong as the airy issupplled in Isuch quantities las to hold the ports in-register,

'l and no amount of pressure of air-in excess of that predetermined can enter. the tire.

40 When the ai-r supply ceases, the valve 5, will immediately seat, and seal the air inthe tire,

whichv vnow contains just that-amount pre viously determined upon. Since no excess of air can be supplied and the exact supply y .5 cany be previously determined, the use' of a gage. isy entirely' unnecessary.` When'f a higher vpressure is desired, the plug ismalnipulated as before to bring the next port in ,the tube inl lline' withl the port 20, in the sleeve.` -The greater vthe distance` between the ports, the

. 'supplied to the tire.

and externally vided with a vent28, for the. passage of the excess air lin the tire. y I p be'r threading *therein wardly directed-.",tube,

said tube, ,"jholdingsaid 'piston spaced from saidxnema 'piston' slidable on graduations 22, on the plug-3,y

`disposedinwardly `directed tube, a

greater willbe the pressure After the manipula'- tion of the plug'forvthe purpose. mentioned, 1 'y it may be locked in position by a lock nut 26. The top of the plug is preferably reducedv threaded fora-cap 27, pro- 1. A valve comprising'a housing, a memy l and havmg an in.A 'said tube,

a "c ompressible meansnormally tube and pivotallj7 l'connectedito s leverl fullr fcrumed in said housing, andmeans opera- -Q tively connected with said `plst'on toope'ra-te of air in said housing. l.

2. valve 4( :omprising a. hb png', amember. threading therein andv'havin'g an wardl directed tube, atpistommovable `on and with/saidftube, a compressible .means vto holdlsaidgpiston'in normal position and to said valve when movingunder the pressure move same with saidme'mber, a valvefbea'rcrumed in said houslng -and'lpivotallyconnected with sa-id ,valve, s tively connected withand controllablel byv the'mov'em'entofsaid pis'tn in onejdirection to operate saidjyalve. 1 3. Avalvecomprising a housing,`a member movable longitudinally ing a`n inwardly" directed tube, rapistonmovlongitudinally movable on said tube, means to holdvsaid piston, on said tube when-saidA plug is moved .in `one direction,-a.'yielding ,means between said-piston andplug to 'cause said` piston 'to `be movedvwith said plugin I another directlon, a spring-pressed bearing against the end of having a stem, a tlever. fulcrumed in said houslng and pivotally connected at one end 'I and a link carried'bysaid with said stem, p piston and provided with .a knobA extending in operative relation to theother 4end of andz means `operatherein andfhav- 185' 4able on and'relatively to s aidtube and y'ieldf `ing'ly held spaced from said member,l a valve `when said piston movesin one; direction,

a plug t valve said' tube and said piston in one direction, to unseat said l,

valve, said lever movablefwitli said piston govern -thev and with respect tothe lever to time of operation of the valve.

5. A val ber movable therein and having' ve .comprising afhousing, a mem- 'j' an inwardly g directed tube provided with portsfarpiston` movableJongitudinally on said Atl'ibfe and having a. sleeve'fprovided with a port, said member being rotatable topcause Aone-of the4v 2.

.ports .in said tube 'to'be brought inline with the port .in'said sleeve',

the sleeve thelfnregisters with the portlin lever fulorumed'in saidhousing, andmea'ns movable-.vitesse Pieten"teamassed..

.6I .benja valvebearjing against theend of said lever'.

and said piston being. movablefund'ergpressure '.until the 'portk in 125 af Fvalve seating against the endg., 'of said/ tube and pivi'ntallyv connectedy ytofu- 11D said lever and operable by the .movement of 6. A valve mechanism comprising a casing, a member threading therein having a passage, a piston associated and movable longitudinally with said member in one direction and relatively to said member under pressure, a valve to seal the opening in said passage, means on said piston having operative connection with said valve and movable with said piston in the one direction to predetermine the time ot operation ot' said valve, and in another direction to operate said valve.

7. A valve mechanism comprising a casing arranged tor communication with a Huid container, a member mo vable therein longitudinally provided with a passage way andv a plurality of ports, and having an outlet, a piston movable relatively to said member and Jforming with said member a chamber, and having a port, said member being rotatable to bring one ot the ports therein in line with the port in said piston to predeterlnine the amount of iiuid to be supplied, whereby when the port in said piston registers with one ot' the ports in said member the fluid will escape therethrough into said chamber and through the outlet in said member, and a valve to seal the passage in said member.

8. A valve mechanism comprising a casing, a member movable longitudinally therein and provided with a passage way, a piston on and movable with said member longitudinally. a yielding means between said piston and member, a valve to seal the passage :in said member, a lever tulcrumed in said casing and connected at one end to said valve, and means in operative relation to said lever and eontrollable by the movement ot' said piston iin one direction to predetermine the timel l actuation ot said valve, and in another direction to actuate said valve.

9. A valve mechanism comprising a casing, a member longitudinally movable therein and having a passage, a piston movable with said member in one direction and relatively to said member in another direction under pressure, a spring between said member and piston, a valve to seal said passage, and means in operative relation to said valve and controllable by the distance of travel of said piston for operating said valve at a predetermined pressure.

10. A valve mechanism comprising a casing, a manually movable member therein having a passageway, a valve to seal said passageway, a piston having means for operating said valve and movable with said member to predeterminc the time of operation ot said valve, said piston movable under pressure to operate said valve.

ll. A valve comprising a housine', a member therein having a passage way and an outlet, a valve normally closingsaid passage way, a lever Vt'nlernmed in said housing and connected at. one end to said valve, a spring held piston on said member having a port. said member having a plurality of staggered ports and being axially movable to aline one of the ports therein with the port in said piston, means on said-piston and in operative relation to said lever to engage aml aetuate said valve when said piston is moved by eX- pansion ot' air, said piston servingto relieve excess air pressure supplied when the port therein registers with one ol the ports in said member.

ln testimony whereol5 l allix my signature in the presence ol' two witnesses.

JOHN NATHAN.

lVitnesses:

Fiumi Nicwwnmr, AN'rox (lim-:'rzxiaz, Jr. 

